Hot-water injector.



T. H. WHITE.

HOT WATER INJEGTOR.

APPLICATION FILED 001221, 1912.

1,082,220. Patented Dec.23, 1913.

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COLUMBIA PLANQQRAPH Co\vAsHlNaToN. D. C4

T. H. WHITE.

HOT WATER INJEGTOR.

APPLICATION FILED 00T. 21, 1912.

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UNITED STATES ,FATFLNVI THOMAS HENRY WHITE, 0F PENIDLETON, SALFORD,ENGLAND.

HOT-I/VATER INJECTOR.

To all whom i may concern:

Be it known that I, THOMAS HENRY WHITE, a subject of the King of GreatBritain and Ireland, and resident of Pendleton, Salford, in the countyof Lancaster, England, have invented certain new and useful Improvementsin Ilot-"Water Injectors, of which the following is a specification.

This invention has reference to improvements in injectors for hot water,and has for its object to render the starting or restart-ing of suchinjectors absolutely certain and reliable.

It is usual in injectors of the kind referred to and also in certainother kinds to provide overflow or escape valves, which may be eitheropen, or are selfactingly opened at startin or re-starting of theinjector and allow tie escape of steam or fluid from an orifice or gapor orifices or gaps as the case may be, situated either upon or betweenthe nozzles, and also allowing in certain cases, the escape of steam orfluid from certain other points upon such nozzles, the valves closingselfactingly when the jethas been established in such a manner as toprevent egress or escape of such jet to the atmosphere.

Referring to the 2 sheets of drawings hereto appended four differentkinds of injectors are shown as examples of the manner in which theinvention may be carried out, which are of single tube type, but Idesire it to be distinctly understood that the arrangements ofself-acting valves as shown, may be applied to any other type ofinjector, to which they may be suitable or adaptable.

In Figure 1 the valves are shown arranged to close by the medium ofsteam pressure,

,but they may alternatively by suitable arrangement of a passage to thedelivery chamber, in lieu of that to the steam chamber of the injectorbe equally well arranged to close the agency of boiler pressure. In Fig.2 the valves are shown, arranged to close by the medium of boilerpressure, but they may alternatively by a suitable arrangement of apassage to the steam chamber in lieu of that to the delivery chamber ofthe injectors, be equally well arranged to close by the agency of steampressure. Fig. 3 shows an example of closing the valves by boilerpressure, and Fig. 4L illustrates a similar example of closing thevalves by overflow pressure only.

Specification of Letters Patent.

Application filed October 21, 1912.

Patented Dec. 23, 1913.

serial No. 727,019.

lIhe arrangement of and manner in which the said self-acting valvesoperate, as shown by the various drawings may be described as follows Inthe injector shown by Fig. 1, steam being admitted at starting, flowsthrough the cones 1, 1, 2, 3, 3a, and passes by way of the gaps et, 5and 5a into chambers G and 7 which are controlled respectively by thevalves 8 and 9. Immediately the steam sets up pressure in such chambers6 and 7 the valves 8 and 9 are moved from their seats thereby and thesteam escapes to the atmosphere by way of the annular passage 10 andoverflow outlet 11. A small relief valve 12 having movement within theguide on cap 12a and a piston 13 having movement within the guide 13aare arranged as shown on the same axial lines respectively as the valves8 and 9 are. rEhe valve 12 is nearly in contact with the valve' 8 whilethe piston impinges upon valve 9. It will be obvious therefore that asthe valves 8 and 9 are blown outward by the steam, they will byimpingement, also move the valve 12 and piston 13 outward. Now the valve12 in this position is open and so allows any steam passing from thesteam chamber 1b by way of the passage 111 into the chamber 15 to freelyescape through the orifice upon which the valve 12 seats itself, intothe annular passage 10 and thence to the atmos phere by the overflowoutlet 11 and in consequence of this the valves 8 and 9 at starting ofinjector, have full and unimpeded movement. TWhen the jet has beenformed steam pressure will not exist in the chamber G and the valve 8therefore returns to its seat by gravity. Steam passing from chamber 1bby passage 14 enters chamber 15 and acting upon the upper side of valve12 positively closes it to its seat. rlhe steam further passes throughthe passage 16 into the chamber 17 acts upon the piston 13 and causes itto also close the valve 9 to its seat. llhus, as is necessary whentheinjector is in operation, all outlets for the escape of fluid fromany one chamber into any other chamber, or from any chamber to theatmosphere, are suitably closed. In event of the action of the injectorbeing interrupted steam again passes into the chambers 6 and 7 and thewhole process in relation to the action of the valves as hereindescribedis repeated. A supplementary water inlet valve is shown by 18 to admit asecondary supply of water to the injector cones, when necessary. 1n thisarrangement it will be noted, that the chambers 6 and 7 are separate anddistinct.

1n the injector as shown by Fig. 2, steam being admitted at startingflows through the cones 1, 2, 3, and passes by way of the gaps 4 andinto chambers G and 7 which are controlled respectively by the valves Sand 9. immediately the steam sets up pressure in the chambers 6 and 7,the valves 8 and 9 are moved from their seats thereby. The steam inchamber' '5 passes through the orifice upon which the valve 3 seatsitself, enters chamber 7 and flows with the steam therein past the valve9 into passage 1() and thence by way of the overflow outlet 11 to theatmosphere. A small relief valve 12 having movement in the guide 122Land a piston 13 having movement fluid tight 'in the guide 13a arearranged as shown on the same axial lines respectively as the valves 8and 9. rlie valve 12 is nearly in contact with the valve S while thepiston 13 impinges upon 9. 1t will be obvious therefore, that as thevalves 8 and 9 are blown outward by the steam that they will, byimpingement, also move the valve 12 and piston 13 outward. Now the valve12 in this position is open and so allows any steam passing' intochamber 15 by way of the delivery tube 19, chamber 20 and passage 14 tofreely escape through the orifice upon which the valve 12 seats itself,thence between the webs on valve 8 into the chamber 7 and by the valve 9and passage 10 to the overflow outlet 11, and in consequence of this,the valves 8 and 9 at starting of the injector have full and unimpededmovement. When the jet has been formed, the valves S and 9 fall to theirseats by gravity, while fluid on its emergence from the tube 19, flowsby way of 20 and passage 14, into chamber 15, forming fluid pressuretherein, which acting upon upper side of relief valve 12 firmly retainsit on its seating. Now as will be seen from the drawing and ashereinbefore stated there is a slight amount of play or clearancebetween the valves S and 12 and as there will be a certain flow o-ffluid from the chamber G, due to escape from the gap 4, the valve 8 inconsequence would not hold fluid tight upon its seat as is necessary,were it not for the fact that there is a greater volume of iuid escapingfrom the gap 5 into chamber 7, and this rapidly forming pressure in thesaid chamber T, acts upon the upper side of the valve 8, andconsequently retains it upon its seat. rhus, as is necessary, when theinjector is in operation all outlets for the escape of fluid from anyone chamber into any other chamber, or from any chamber to theatmosphere are suitably closed. 1n event of the injector beinginterrupted, steam again passes into the chambers 6 and 7, and the wholeprocess in relation to the action of the valves, as hereinbefore,described, is repeated. 1t will be noted that unlike the arrangementshown in Fig. 1, in this modification, the chambers 6 and 7 are incommunication one with the other, by means of the orifice controlled byvalve 8. In this Fig. 2 an unloaded nonreturn valve in the suctionbranch of the injector intended as hereinbefore described to prevent anyback flow of steam into the water suction pipe, and to render the actionof the above overflow valves more positive and certain, is shown by 21.

In Fig. 3, a further arrangement of these self-acting valves in a singletube injector is shown. The arrangement and operation of such being asfollows On starting of injector, steam hows through cones 1, 2, 3, andpasses by gaps 4, 5, into the chamber G, and opening the valve 8 passesto the atmosphere by way of the overflow outlet 11. @n the same aXis asthe valve 8 are the pistons 22 and small relief valve 12, the pistonsliding fluid tight through the valve, which is suitably bored toreceive it, while the valve, which is of ordinary webbed or winged form,so as to allow the passage of fluid between such webs or wings, slideswithin suitable orifice prepared to receive itin the guide 23. The valve12 is nearly in contact with the valve 8 while the piston 22 impingesupon S. Obviously therefore as valve 8 is blown from its seating it willalso move the piston 22 and valve 12. In this position the valve 12 isopen and thus allows any steam passing into chamber 2O by way of thedelivery tube 19 to freely escape through the orifice upon which valve12 seats itself, thence by 11 to the atmosphere, and in consequence ofthis at the starting of the injector the valve S has full and unimpededmovement. When the jet is established, fluid emerging from the deliverytube 19 closes the valve 12 to its seat, and in consequence fluidpressure accumulates in the chamber 20 and returns the valve 8 by meansof the piston 22 to its seat and effectually seals the chamber 6. Inevent of the action of the injector being interrupted, steam againpasses into chamber, and the whole process in relation to the action ofthe valves is repeated. A sleeve valve 24 arranged and operating in theknown way is shown on the cone 3 for closing the gap 4 and preventingentry of fluid from the gap 4 into 6.

1n the modification shown by Fig. 4, the arrangement of the self-actingvalves is somewhat similar to that shown by Fig. 3, but in Fig. 4, thevalves are closed by over- `flow pressure and not as in Fig. 3 by boilerpressure. The arrangement and operation of the valves in Fig. 4 is asfollows On starting of the injectors, steam flows through cones l, 2, 3,and passes by gaps 4, 5, into chambers 6 and 7 and opening valve S,flows by way of the passage 10 and overflow outlet 11, to theatmosphere. On the same aXis as valve 8 is the piston 22 and smallrelief valves 12, which are arranged and act on starting the injector,as described with reference to the parts indicated by the same lettersin Fig. 3, so that the valve 12 is open and thus allows any steampassing into chamber 7 by the gap 5 to escape freely through 10 and 11to the atmosphere, and so the valve 8 has free and unimpeded movement.When the jet is established, fluid emerges from the gap 5, closes thevalve 12 and the fluid pressure accumulating in the chamber 7 closes thevalve 8 by means of the piston 22, and the chambers 6 and 7 areeffectually sealed, and as is necessary when the injector is inoperation, all outlets for the escape of fluid from any chamber to theatmosphere are closed. ln event of the action of the injector beinginterrupted steam again passes into chambers 6 and 7 and the wholeprocess in regard to the action of the valves is repeated.

it will be noted that only in Fig. 1 is a supplementary water inletvalve shown, but such fitting may be equally applied to the otherinjectors as shown by the Figs. 2,3, and 4. Likewise, the nonsreturnvalve 21 in the suction branch, is only shown in Fig. 2, but it mayequally well be applied to the injectors as shown by Figs. 1, 3, and 4:.

l claim as my invention.

1. 1n injectors for hot water the combination of nozzles having gapsbetween them, chambers surrounding said nozzles and gaps and providedwith outlet orifices, an overflow passage communicating with saidorifices and leading to the overflow outlets, free 'lifting or movingoverflow valves adapted to close said orifices, a chamber filled withsteam or water or both at the starting or restarting of the injector, asmall orifice therein leading into said overflow passage, a free liftingor moving valve closing said small orifice and adapted to be opened bythe outward movement of one of the overfiow valves.

2. fn injectors for hot water the combination of nozzles having gapsbetween them, chambers surrounding said nozzles and gaps and providedwith outlet orifices, an overflow passage communicating with saidorifices and leading to the overflow outlet, free lifting or movingoverflow valves adapted to close said orifices, a chamber filled withsteam or water or both at the starting or restarting of the injector, asmall orifice therein leading into the said overflow passage andarranged coaXially with one of said overflow valves, and a free liftingor moving valve closing said small orifice and nearly in contact withthe overflow valve.

3. In injectors for hot water the combination of nozzles having a gapbetween them, a chamber surrounding said gap and provided with an outletorifice, an overflow passage communicating with said orifice and leadingto the overflow outlet, a free lifting or moving overflow valve adaptedto close said orifice, a chamber filled with steam or water or both atstarting or restarting of the injector, a small orifice therein leadinginto said overflow passage, a free lifting or moving valve closing saidorifice and adapted to be opened by the outward movement of saidoverflow valve.

l. ln injectors for hot water the combination of nozzles having a gapbetween them, a chamber surrounding said gap and provided with an outletorifice, an overflow passage communicating with said orifice and leadingto the overfiow outlet, a free lifting or moving overflow valve, adaptedto close said orifice, a chamber filled with steam or water or both atstarting or restarting of the injector, a small orifice therein leadinginto said overflow passage and arranged coaXially with said overflowvalve, and a free lifting or moving valve closing said small orilice andnearly in contact with the overflow valve.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses.

THOMAS HENRY WHITE.

Witnesses FREDERICK JOHN BORLAND, CARL BOLL.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

